A polarized single crystal Raman study of the librational phonons in p-diiodobenzene

S. P. Cramer, B. Hudson, D. M. Burland

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

Single crystal polarized Raman spectra of p-diiodobenzene in the region from 0 to 300 cm-1 are presented for sample temperatures from 2 to 330 K. Eleven of the twelve predicted gerade librational phonons are unambiguously assigned in terms of their space group symmetries. The temperature dependence of the Raman spectra does not show a soft gerade phonon at the nearly second-order phase transition which occurs at 326 K. A significant anharmonicity for molecular motions above the I-I axis is indicated by the observation of overtones and combinations and broadening of these phonons as the temperature is raised from 2 K.

Original languageEnglish (US)
Pages (from-to)1140-1145
Number of pages6
JournalThe Journal of Chemical Physics
Volume64
Issue number3
DOIs
StatePublished - Jan 1 1976

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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